import requests
from operator import itemgetter

url = 'https://hacker-news.firebaseio.com/v0/topstories.json'
r = requests.get(url)
print("Status code:",r.status_code)

submission_ids = r.json()
submission_dicts = []
for submission_id in submission_ids[:3]:
    # 对每一篇文章都执行一个调用
    url = ('https://hacker-news.firebaseio.com/v0/item/'+str(submission_id)+'.json')
    submission_r = requests.get(url)
    print(submission_r.status_code)
    response_dict = submission_r.json()
    submission_dict = {
        'title' : response_dict['title'],
        'link': 'https://news.ycombinator.com/item?id='+str(submission_id),
        'comments': response_dict.get('descendants',0)
    }
submission_dicts = sorted(submission_dicts, key=itemgetter('comments'),reverse=True)

for submission_dict in submission_dicts:
    print("\nTitle:",submission_dict['title'])
    print("Discussion link:",submission_dict['link'])
    print("Comments",submission_dict['comments'])


